#FILE CRYPTER ARCHIVE#

The file itself is a tar archive in the following structure: someFile.crypto

#FILE CRYPTER FULL#

crypto file extension, which is appended to the full file name (including the extension) of the file originally encrypted.

This file stores both the encrypted version of the user file and the public credentials needed to encrypt and decrypt it. The dir part is only included for directories CRYPTO file FormatĪ CRYPTO file is the product of the Crypter encryption process. These credentials are stored in the creds file of the CRYPTO file archive (as delineated above) in the following format: v1 Crypter#iv#authTag#salt#dir These can be stored publicly without compromising security since it is fairly impossible (by current standards) to reconstruct the encryption key without the MasterPass and its credentials. These are needed to reconstruct the particular encryption key and to verify data integrity. Public credentialsĬertain credentials are required to decrypt the encrypted data. It then reads the credentials from the creds file and decrypts the data file into the original file or directory (after decompressing it) with its original name and extension, as deduced from the CRYPTO file name (e.g. During decryption, Crypter creates a temporary hidden directory named '.decrypting'.

The decryption process is essentially the inverse of the encryption process. Finally, Crypter compresses the directory to a tar archive with the name of the user-selected file and the '.crypto' extension appended to it. It also writes the public credentials to a file within the same directory, namely 'creds'. If it is a directory then it is compressed first (tar). It then encrypts the user-selected file with the crypto defaults and flushes the encrypted data to a file in the directory, namely 'data'. When encrypting a file, Crypter first creates a temporary hidden directory, namely '.crypting'. MPK_ITERATIONS: 100000 // MasterPassKey derivation iterations IVLENGTH: 12, // initialisation vector lengthĪLGORITHM: 'aes-256-gcm', // encryption algorithm ITERATIONS: 50000, // file encryption key derivation iterations The following are the crypto defaults and can be found under app/config.js: // Crypto defaults This ensures that data integrity is verified on decryption and allows the app to detect tampering or data corruption. the app is launched).Īuthentication with the AES-256-GCM symmetric block cipher is used by default. These credentials are used to re-derive the MasterPassKey every time that Crypter is executed (i.e. Every time you set the MasterPass through the setup or reset it through Verify MasterPass, the MasterPassKey is derived from the MasterPass using a newly generated set of (random) credentials. Every time a file is decrypted, the encryption key is re-derived from the MasterPassKey. Instead, it derives a MasterPassKey from it, which it then uses to derive the encryption key used to encrypt your file. Your MasterPass is the only thing that you need to remember.Ĭrypter never directly encrypts anything with your MasterPass. Moreover, by publicly storing the credentials used to derive the MasterPassKey and the salts used to derive the encryption keys, you are able to produce the encryption keys at will and without needing to store them securely. This method allows for the generation of very secure encryption keys for data encryption. It then uses PBKDF2 to derive a number of encryption keys from the MasterPassKey that can be used for the encryption of files.

#FILE CRYPTER INSTALL#

So to install it, simply run the following command in the Terminal: $ brew install -cask ScreensĬrypter derives a MasterPassKey from the MasterPass obtained at setup by using the PBKDF2 key derivation algorithm (see below for the specification). InstallationĪll prebuilt binaries for all major platforms are available under releases.Ĭrypter is also on Homebrew Cask for macOS.

#FILE CRYPTER PASSWORD#

It simplifies secure password generation and management and requires you to only remember one bit - your MasterPass.

It tackles one of the weakest links in most security systems today - weak passwords. Remember only a bit.Ĭrypter is a cross-platform crypto app that makes encryption and decryption convenient while still upholding strong security. An innovative, convenient and secure crypto app.Įncrypt unlimited bits.

File crypter